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ThunderVolt Pro

Advanced battery protection for people who want more than standard charge limits. Adaptive Mode, forecasting, remote control, storage mode, scheduling, and cross-device sync.

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€2.99/mo  ·  €13.99/yr

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Sub-80% Precision Limits
Apple's native limiter stops at 80%. ThunderVolt Pro goes all the way down — Storage Mode locks at 50% for long-term shelf storage, or dial in any custom threshold from 20% to 100%.
  • 20–100% custom range — finer control than standard battery utilities
  • 50% Storage Mode — purpose-built for long-term shelf storage
  • Sailing band / Hysteresis buffer — eliminates charge cycling
  • Discharge to target % while plugged in — free tier
Remote Control from iPhone & Watch
Full charge management from your wrist or phone — limits, modes, Sailing band, discharge, and live power flow. Apple's limiter is Mac-only. ThunderVolt follows you everywhere.
  • Set charge limit (20–100%) from iPhone or Watch
  • Toggle Storage Mode, Apple Mode, Smart Context remotely
  • Sailing Mode control — switch band preset from your wrist
  • Trigger discharge to target % while Mac is plugged in
  • Live power flow — AC watts & battery charge/drain
  • Heat & calibration alerts pushed to your wrist
AI Coach & Forecasting
Tracks your real health trend as −%/month, predicts your replacement date months before Apple's indicator moves a point, and proactively suggests schedule rules based on your charging patterns.
  • Real-time degradation rate (−%/month)
  • 12-month health forecast & replacement quarter
  • Pattern detection — spots overnight charging habits automatically
  • Proactive scheduling suggestions — "Create Night Mode schedule?"
  • Weekly Health Report every Sunday — cycles saved, heat events
Smart Context — Travel Days
ThunderVolt reads your calendar. Detected a flight tomorrow? It automatically charges to 100% tonight, then drops back to your limit after you land. No other app in the world does this.
  • EventKit travel day detection
  • Auto-charges to 100% before flights & trips
  • Returns to limit after landing — automatically
  • Push notification: "Charging for your trip"
Charge Scheduler
Set rules that automatically apply a charge limit on specific days and times. "Weekdays 9–5: hold at 70%. Weekends: charge to 90%." No equivalent in standard battery utilities.
  • Day & time rules — any combination of days and hours
  • Auto-discharge when a rule activates — drops to your target before the window
  • Multiple rules with conflict detection
  • Daemon-evaluated — works even when the app is quit
  • Smart Routines — one-tap preset templates (Desk Worker, Night Mode, Creator Weekend, Storage)
Stop Charging on Sleep
Pause charging the moment your Mac sleeps or the lid closes. Resumes automatically on wake. Prevents phantom charging overnight at your desk.
  • IOKit power message monitoring
  • Instant pause on sleep / lid-close
  • Silent resume on wake
Live Power Flow
A real-time Sankey diagram shows exactly where every watt is going — AC adapter split between system load and battery charging, proportionally.
  • Proportional Bézier flow bands
  • AC adapter, system load, battery — live
  • Updates every hardware polling cycle
Health Intelligence
Raw hardware data from IOKit, calibration history tracking, and one-click CSV export. Everything you need to understand your battery's true condition over years, not weeks.
  • Cycle count, design capacity, max capacity, voltage — direct from hardware
  • True health % calculated from design vs actual capacity
  • Calibration history — last date, next recommended, overdue warning
  • Monthly calibration reminder notification
  • Export full history as CSV — timestamp, health, thermal state
Fleet Sync — All Your Macs
Monitor every Mac in your household from a single iPhone view. Private CloudKit sync — your data never leaves Apple's infrastructure.
  • Unlimited device monitoring
  • Private iCloud sync (E2E encrypted)
  • Per-device charge control from iPhone
  • Device grouping — assign Home, Work, or Personal labels
Privileged Daemon Control
ThunderVolt uses a privileged system daemon with documented SMC key access via Apple's IOKit — more capable than App Store alternatives. App Store sandboxing prevents this level of control. Advanced (Direct) Edition Only
  • BCLM / CH0B key writes (Apple Silicon + Intel)
  • Apple Notarized & Gatekeeper approved
  • 7-day free trial — instant download
Why Upgrade

Why Upgrade to Pro?

ThunderVolt Pro combines advanced battery controls with features traditional battery apps don't offer.

Remote Control Anywhere
Control your Mac battery from iPhone and Apple Watch, including Adaptive Mode.
Smart Calendar Charging
Automatically top up before flights, trips, and important meetings.
AI Charging Coach
Learns your charging habits and suggests better overnight schedules.
Battery Forecasting
See 12-month health projections and estimated replacement timing.
Weekly Health Reports
Every Sunday: cycles saved, heat events, wear trends.
Fleet Sync
Organize multiple Macs into Home, Work, or Personal groups.
Background Protection
Heat Protection and Sailing Mode continue even when the app is closed.
Built for Modern macOS
Works with native battery controls through conflict-free Smart System Mode.
ThunderVolt Pro adds automation, forecasting, remote control, and ecosystem features that standard battery utilities don't provide. Focused on modern automation and cross-device convenience.
Simple Pricing

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Free
€0
forever
  • Basic charge limits
  • Native mode support
  • Battery overview
Download Free
Monthly
€2.99
per month
7-day free trial included
  • All Pro features
  • 7-day free trial
  • Cancel anytime
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Best Value
Annual
€13.99
per year
Save 61% vs monthly (€1.17/mo)
  • All Pro features
  • Full Pro access
  • 7-day free trial
Buy Pro
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Full Feature Comparison

Feature Free Monthly Annual
Core
Charge Limit (50–100%) ✔ ✔ ✔
Manual Discharge ✔ ✔ ✔
Basic Battery Stats & Health ✔ ✔ ✔
Live Power Flow Basic Full Full
Pro Charging
Sailing Mode / Hysteresis Buffer — ✔ ✔
Automatic Discharge (incl. Clamshell) — ✔ ✔
Heat Protection (SMC Thermal Guard) — ✔ ✔
Stop Charging When Sleeping — ✔ ✔
MagSafe LED Control — ✔ ✔
Hardware Battery Percentage Mode — ✔ ✔
Intelligence
Adaptive Mode (auto charge strategy) — ✔ ✔
Quick Modes (one-tap presets) — ✔ ✔
Travel Intelligence (calendar top-up) — ✔ ✔
AI Coach (pattern detection & scheduling suggestions) — ✔ ✔
Battery Forecasting (12-month projection) — ✔ ✔
Weekly Health Reports — ✔ ✔
Full Recurring Task Scheduler — ✔ ✔
Smart Routines (preset schedule templates) — ✔ ✔
Apple Shortcuts Integration — ✔ ✔
Ecosystem
iOS & Apple Watch Remote Control — ✔ ✔
Fleet Sync (Unlimited Macs) — ✔ ✔
Fleet Device Grouping (Home / Work / Personal) — ✔ ✔
Support
Priority Support Basic ✔ ✔
7-Day Free Trial — ✔ ✔
Pro Benefits

What Pro unlocks

Everything you need to protect battery health — and more.

Remote Control EXCLUSIVE
Control your Mac's battery from iPhone and Apple Watch, including Adaptive Mode.
Smart Calendar EXCLUSIVE
Automatically top up before flights, trips, and important meetings.
AI Coach EXCLUSIVE
Learns your charging habits and suggests the perfect Night Mode schedules.
Battery Forecasting EXCLUSIVE
12-month battery health projection and replacement quarter estimate.
Weekly Health Reports EXCLUSIVE
Delivered every Sunday — cycles saved, heat events, and trend summary.
Fleet Sync EXCLUSIVE
Group and monitor all your Macs by Home, Work, or Personal.
Background Protection EXCLUSIVE
Heat Guard & Sailing Mode continue working even when the app is quit.
Modern macOS Ready EXCLUSIVE
Built for macOS 26.4+. Smart System Mode works with native controls — not against them.

Upgrade from manual battery limits to intelligent battery protection.

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